Differences between revisions 2 and 48 (spanning 46 versions)

RaspberryPi

https://www.raspberrypi.org/
https://en.wikipedia.org/wiki/Raspberry_Pi
Kit in https://www.chiptec.net/pcs-e-mobilidade/computadores/raspberrypi/kit-raspberry-pi-3-modelo-b-noobs-caixa-carregador-preto.html (Kit Raspberry Pi 3 Modelo B+(NOOBS+Caixa+Carregador) Preto)
Raspberry Pi 3 Model B Plus Rev 1.3

Processador     
  Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.4GHz
Memória RAM     
  1GB LPDDR2 SDRAM
Armazenamento   
  Cartão MicroSD 32GB com NOOBS
Wi-Fi e Bluetooth       
  2.4GHz e 5GHz IEEE 802.11.b/g/n/ac wireless LAN, Bluetooth 4.2, BLE
LAN     
  Gigabit Ethernet em USB 2.0 (saída máxima 300 Mbps)
Expansão        
  Extended 40-pin GPIO header
  CSI camera port
  DSI display port
  4-pole stereo output e composite video port
Portas  
  HDMI 
  USB 2.0 (4) 
  Micro-SD
Alimentação     
  Entrada 5V/2.5A DC
Prazo de Garantia       
  2 Anos

BCM2835

Timers
Interrupt controller
GPIO
USB
PCM / I2S
DMA controller
I2C master
I2C / SPI slave
SPI0, SPI1, SPI2
PWM
UART0, UART1

Install and configure screensaver and lock screen

sudo apt-get install xscreensaver
Preferences, Screen saver
Auto lock after 2 minutes
Create new menu item (Preferences, Main menu editor)
- Menu item name Lock
- Command: xscreensaver-comand -lock
- Icon: /usr/share/lxpanel/images/ns-lock.png

Info

   1 lsb_release -a
   2 # No LSB modules are available.
   3 # Distributor ID:       Raspbian
   4 # Description:  Raspbian GNU/Linux 9.4 (stretch)
   5 # Release:      9.4
   6 # Codename:     stretch
   7 
   8 uname -a
   9 # Linux raspberrypi 4.14.71-v7+ #1145 SMP Fri Sep 21 15:38:35 BST 2018 armv7l GNU/Linux
  10

Install eclipse

apt-get install eclipse-platform

Blink led port 26

https://www.raspberrypi.org/documentation/usage/gpio/python/README.md
https://gpiozero.readthedocs.io/en/stable/
python drive_gpio26.py

   1 # drive_gpio26.py
   2 from gpiozero import LED
   3 from time import sleep
   4 
   5 led = LED(26)
   6 
   7 while True:
   8     led.on()
   9     sleep(1)
  10     led.off()
  11     sleep(1)

Install python 3.8.5 in raspberry py

   1 tar xvzf Python-3.8.5.tgz 
   2 cd Python-3.8.5/
   3 ./configure 
   4 make clean
   5 make
   6 make install
   7 sudo make install
   8 /usr/local/bin/python3.8 -v
   9 /usr/local/bin/pip3.8 install cherrypy
  10 pip3.8 install jinja2

Enable X11 forwarding

   1 # Raspberry pi side
   2 sudo nano /etc/ssh/sshd_config
   3 # add line X11Forwarding yes
   4 service ssh restart
   5 # client side
   6 ssh -X -Y userx@192.168.2.3
   7 echo $DISPLAY
   8 leafpad & # text editor
   9 pcmanfm & # file explorer
  10

Blink led service

Starts automatically after boot.

/home/pi/Documents/drive_gpio26.py

   1 from gpiozero import LED
   2 from time import sleep
   3 import os
   4 
   5 f = open('/tmp/drive_gpio26.pid','wb')
   6 f.write(str(os.getpid()))
   7 f.close()
   8 
   9 led = LED(26)
  10 
  11 while True:
  12     led.on()
  13     sleep(1)
  14     led.off()
  15     sleep(1)

/etc/init.d/drive_gpio26

   1 #! /bin/sh
   2 ### BEGIN INIT INFO
   3 # Provides:          drive_gpio26
   4 # Default-Start:     2 3 4 5
   5 # Default-Stop:
   6 # Short-Description: Blinks a led
   7 # Description:       Blinks a led
   8 ### END INIT INFO
   9 touch /var/lock/drive_gpio26
  10 # Carry out specific functions when asked to by the system
  11 case "$1" in
  12   start)
  13     echo "Starting script drive_gpio26 "
  14     su pi -c "nohup /usr/bin/python /home/pi/Documents/drive_gpio26.py >> /tmp/drive_gpio26.log 2>&1  &"
  15     ;;
  16   stop)
  17     echo "Stopping script drive_gpio26"
  18     kill $(cat  /tmp/drive_gpio26.pid)
  19     ;;
  20   *)
  21     echo "Usage: /etc/init.d/drive_gpio26 {start|stop}"
  22     exit 1
  23     ;;
  24 esac
  25 
  26 exit 0

   1 update-rc.d drive_gpio26 defaults # insert links in /etc/rc*d
   2 update-rc.d drive_gpio26 defaults 20 80
   3 update-rc.d drive_gpio26 enable
   4 service drive_gpio26 status 
   5 reboot

Install MariaDB raspbian

   1 sudo bash
   2 apt install mariadb-server
   3 mysql_secure_installation
   4 # define root pass
   5 mysql
   6 GRANT ALL ON *.* TO 'admin'@'localhost' IDENTIFIED BY '????????' WITH GRANT OPTION;
   7 FLUSH PRIVILEGES;
   8 create database testdb;
   9 show databases;
  10 use testdb
  11 CREATE TABLE locations ( id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, lat VARCHAR(30) NOT NULL, lon VARCHAR(30) NOT NULL);
  12 exit
  13 mysql -u admin -p
  14 sudo pip3.8 install mysql-connector-python
  15 #
  16 python 3.8
  17 import mysql.connector
  18 mysql.connector.connect(host='localhost',database='testdb',user='admin',password='xxxxxxxx')

test_mariadb.py

   1 import mysql.connector
   2 conn = mysql.connector.connect(
   3   host='localhost',
   4   database='testdb',
   5   user='admin',
   6   password='xxxxxxxx'
   7 )
   8 cursor=conn.cursor()
   9 cursor.execute("Insert into locations (lat,lon) values(%s,%s)" , ("aaa","bbb") )
  10 conn.commit()
  11 print(cursor.rowcount, "record inserted.")

Install Squid Web Proxy

   1 sudo bash 
   2 apt update 
   3 apt install squid
   4 cd /etc/squid/
   5 cp squid.conf squid.conf.ORIG
   6 cat squid.conf.ORIG | egrep -v -e '^[[:blank:]]*#|^$' > squid.conf
   7 nano squid.conf 
   8 acl localnet src 192.168.111.0/24
   9 http_access allow Localnet 
  10 # comment http_access deny all 
  11 service squid reload
  12 #firefox manual proxy 
  13 #IP rpi: 192.168.111.222   Port: 3128
  14 #also for ftp and https
  15

Raspberry Pi Pico

Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces.

Connect with micro-usb

   1 sudo dmesg
   2 # [ 3570.065996] usb 1-4.3: Product: RP2 Boot
   3 # [ 3570.066006] usb 1-4.3: Manufacturer: Raspberry Pi
   4 # [ 3570.066016] usb 1-4.3: SerialNumber: E0C9xxxxxxxx
   5 # [ 3570.163372] usb-storage 1-4.3:1.0: USB Mass Storage device detected
   6 # [ 3570.164049] scsi host2: usb-storage 1-4.3:1.0
   7 # [ 3570.164381] usbcore: registered new interface driver usb-storage
   8 # [ 3570.180142] usbcore: registered new interface driver uas
   9 # [ 3571.192940] scsi 2:0:0:0: Direct-Access     RPI      RP2              3    PQ: 0 ANSI: 2
  10 # [ 3571.194468] sd 2:0:0:0: Attached scsi generic sg1 type 0
  11 # [ 3571.195164] sd 2:0:0:0: [sdb] 262144 512-byte logical blocks: (134 MB/128 MiB)
  12 # [ 3571.195818] sd 2:0:0:0: [sdb] Write Protect is off
  13 # [ 3571.195830] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
  14 # [ 3571.196325] sd 2:0:0:0: [sdb] No Caching mode page found
  15 # [ 3571.196335] sd 2:0:0:0: [sdb] Assuming drive cache: write through
  16 # [ 3571.217448]  sdb: sdb1
  17 # [ 3571.237585] sd 2:0:0:0: [sdb] Attached SCSI removable disk
  18

Update apt source

Set for /etc/apt/sources.list and /etc/apt/sources.list.d/raspi.list

deb http://legacy.raspbian.org/raspbian/ stretch main contrib non-free rpi

Swap 512 MB

   1 nano /etc/dphys-swapfile
   2 # CONF_SWAPSIZE=512
   3 dphys-swapfile swapoff
   4 dphys-swapfile setup 
   5 dphys-swapfile swapon

-  ⇤ ← Revision 2 as of 2018-12-04 15:12:45 → 
  Size: 266
  Editor: localhost
  Comment:
+   ← Revision 48 as of 2024-04-24 15:48:15 → ⇥
  Size: 7516
  Editor: vitor
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
- * Kit in https://www.chiptec.net/pcs-e-mobilidade/computadores/raspberrypi/kit-raspberry-pi-3-modelo-b-noobs-caixa-carregador-preto.html
+ * https://www.raspberrypi.org/
 * https://en.wikipedia.org/wiki/Raspberry_Pi
 * Kit in https://www.chiptec.net/pcs-e-mobilidade/computadores/raspberrypi/kit-raspberry-pi-3-modelo-b-noobs-caixa-carregador-preto.html (Kit Raspberry Pi 3 Modelo B+(NOOBS+Caixa+Carregador) Preto)
 * Raspberry Pi 3 Model B Plus Rev 1.3
{{{
Processador	
  Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.4GHz
Memória RAM	
  1GB LPDDR2 SDRAM
Armazenamento	
  Cartão MicroSD 32GB com NOOBS
Wi-Fi e Bluetooth	
  2.4GHz e 5GHz IEEE 802.11.b/g/n/ac wireless LAN, Bluetooth 4.2, BLE
LAN	
  Gigabit Ethernet em USB 2.0 (saída máxima 300 Mbps)
Expansão	
  Extended 40-pin GPIO header
  CSI camera port
  DSI display port
  4-pole stereo output e composite video port
Portas	
  HDMI 
  USB 2.0 (4) 
  Micro-SD
Alimentação	
  Entrada 5V/2.5A DC
Prazo de Garantia	
  2 Anos
}}}
-Line 5:
+Line 33:
+ * https://projects.raspberrypi.org/en/projects/raspberry-pi-setting-up
 * https://projects.raspberrypi.org/en/projects/raspberry-pi-setting-up/print

== BCM2835 ==
 * Timers
 * Interrupt controller
 * GPIO
 * USB
 * PCM / I2S
 * DMA controller
 * I2C master
 * I2C / SPI slave
 * SPI0, SPI1, SPI2
 * PWM
 * UART0, UART1

== Install and configure screensaver and lock screen ==
 * sudo apt-get install xscreensaver
 * Preferences, Screen saver
 * Auto lock after 2 minutes
 * Create new menu item (Preferences, Main menu editor)
  * Menu item name Lock
  * Command: xscreensaver-comand -lock
  * Icon: /usr/share/lxpanel/images/ns-lock.png

== Info ==
{{{#!highlight sh
lsb_release -a
# No LSB modules are available.
# Distributor ID:	Raspbian
# Description:	Raspbian GNU/Linux 9.4 (stretch)
# Release:	9.4
# Codename:	stretch

uname -a
# Linux raspberrypi 4.14.71-v7+ #1145 SMP Fri Sep 21 15:38:35 BST 2018 armv7l GNU/Linux
}}}

== Install eclipse ==
 * apt-get install eclipse-platform

== Blink led port 26 ==
 * https://www.raspberrypi.org/documentation/usage/gpio/python/README.md
 * https://gpiozero.readthedocs.io/en/stable/
 *  python drive_gpio26.py
{{{#!highlight python
# drive_gpio26.py
from gpiozero import LED
from time import sleep

led = LED(26)

while True:
    led.on()
    sleep(1)
    led.off()
    sleep(1)
}}}

== Install python 3.8.5 in raspberry py ==
{{{#!highlight bash
tar xvzf Python-3.8.5.tgz 
cd Python-3.8.5/
./configure 
make clean
make
make install
sudo make install
/usr/local/bin/python3.8 -v
/usr/local/bin/pip3.8 install cherrypy
pip3.8 install jinja2
}}}

== Enable X11 forwarding ==
{{{#!highlight bash
# Raspberry pi side
sudo nano /etc/ssh/sshd_config
# add line X11Forwarding yes
service ssh restart
# client side
ssh -X -Y userx@192.168.2.3
echo $DISPLAY
leafpad & # text editor
pcmanfm & # file explorer
}}}

== Blink led service ==
Starts automatically after boot.

=== /home/pi/Documents/drive_gpio26.py ===
{{{#!highlight python
from gpiozero import LED
from time import sleep
import os

f = open('/tmp/drive_gpio26.pid','wb')
f.write(str(os.getpid()))
f.close()

led = LED(26)

while True:
    led.on()
    sleep(1)
    led.off()
    sleep(1)
}}}

=== /etc/init.d/drive_gpio26 ===
{{{#!highlight bash
#! /bin/sh
### BEGIN INIT INFO
# Provides:          drive_gpio26
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Blinks a led
# Description:       Blinks a led
### END INIT INFO
touch /var/lock/drive_gpio26
# Carry out specific functions when asked to by the system
case "$1" in
  start)
    echo "Starting script drive_gpio26 "
    su pi -c "nohup /usr/bin/python /home/pi/Documents/drive_gpio26.py >> /tmp/drive_gpio26.log 2>&1  &"
    ;;
  stop)
    echo "Stopping script drive_gpio26"
    kill $(cat  /tmp/drive_gpio26.pid)
    ;;
  *)
    echo "Usage: /etc/init.d/drive_gpio26 {start|stop}"
    exit 1
    ;;
esac

exit 0
}}}

{{{#!highlight bash
update-rc.d drive_gpio26 defaults # insert links in /etc/rc*d
update-rc.d drive_gpio26 defaults 20 80
update-rc.d drive_gpio26 enable
service drive_gpio26 status 
reboot 
}}}

== Install MariaDB raspbian ==
{{{#!highlight bash
sudo bash
apt install mariadb-server
mysql_secure_installation
# define root pass
mysql
GRANT ALL ON *.* TO 'admin'@'localhost' IDENTIFIED BY '????????' WITH GRANT OPTION;
FLUSH PRIVILEGES;
create database testdb;
show databases;
use testdb
CREATE TABLE locations ( id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY, lat VARCHAR(30) NOT NULL, lon VARCHAR(30) NOT NULL);
exit
mysql -u admin -p
sudo pip3.8 install mysql-connector-python
#
python 3.8
import mysql.connector
mysql.connector.connect(host='localhost',database='testdb',user='admin',password='xxxxxxxx')
}}}

=== test_mariadb.py  ===
{{{#!highlight python
import mysql.connector
conn = mysql.connector.connect(
  host='localhost',
  database='testdb',
  user='admin',
  password='xxxxxxxx'
)
cursor=conn.cursor()
cursor.execute("Insert into locations (lat,lon) values(%s,%s)" , ("aaa","bbb") )
conn.commit()
print(cursor.rowcount, "record inserted.")
}}}

== Install Squid Web Proxy ==
{{{#!highlight bash
sudo bash 
apt update 
apt install squid
cd /etc/squid/
cp squid.conf squid.conf.ORIG
cat squid.conf.ORIG | egrep -v -e '^[[:blank:]]*#|^$' > squid.conf
nano squid.conf 
acl localnet src 192.168.111.0/24
http_access allow Localnet 
# comment http_access deny all 
service squid reload
#firefox manual proxy 
#IP rpi: 192.168.111.222   Port: 3128
#also for ftp and https
}}}

== Raspberry Pi Pico ==
 * https://www.raspberrypi.com/documentation/microcontrollers/raspberry-pi-pico.html#technical-specification
 * https://datasheets.raspberrypi.com/picow/pico-w-datasheet.pdf
 * https://datasheets.raspberrypi.com/pico/getting-started-with-pico.pdf
Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces.


=== Connect with micro-usb ===
{{{#!highlight sh
sudo dmesg
# [ 3570.065996] usb 1-4.3: Product: RP2 Boot
# [ 3570.066006] usb 1-4.3: Manufacturer: Raspberry Pi
# [ 3570.066016] usb 1-4.3: SerialNumber: E0C9xxxxxxxx
# [ 3570.163372] usb-storage 1-4.3:1.0: USB Mass Storage device detected
# [ 3570.164049] scsi host2: usb-storage 1-4.3:1.0
# [ 3570.164381] usbcore: registered new interface driver usb-storage
# [ 3570.180142] usbcore: registered new interface driver uas
# [ 3571.192940] scsi 2:0:0:0: Direct-Access     RPI      RP2              3    PQ: 0 ANSI: 2
# [ 3571.194468] sd 2:0:0:0: Attached scsi generic sg1 type 0
# [ 3571.195164] sd 2:0:0:0: [sdb] 262144 512-byte logical blocks: (134 MB/128 MiB)
# [ 3571.195818] sd 2:0:0:0: [sdb] Write Protect is off
# [ 3571.195830] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
# [ 3571.196325] sd 2:0:0:0: [sdb] No Caching mode page found
# [ 3571.196335] sd 2:0:0:0: [sdb] Assuming drive cache: write through
# [ 3571.217448]  sdb: sdb1
# [ 3571.237585] sd 2:0:0:0: [sdb] Attached SCSI removable disk
}}}

== Update apt source ==
Set for '''/etc/apt/sources.list''' and '''/etc/apt/sources.list.d/raspi.list'''
{{{
deb http://legacy.raspbian.org/raspbian/ stretch main contrib non-free rpi
}}}

== Swap 512 MB ==
{{{#!highlight sh
nano /etc/dphys-swapfile
# CONF_SWAPSIZE=512
dphys-swapfile swapoff
dphys-swapfile setup 
dphys-swapfile swapon
}}}